CN102645982B - Image extraction device and method applied to optical pointing device - Google Patents
Image extraction device and method applied to optical pointing device Download PDFInfo
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Abstract
本发明公开了一种应用于光学指示装置的图像提取装置及其方法，本发明的平滑化光学指示装置的光标移动的方法，包含下列步骤：利用一光学指示装置感测一表面的图像并产生感测信号；连续根据该感测信号输出一移动量信号以控制一显示屏幕上的一光标的移动；以及根据该移动量信号所代表的移动速度，不同程度地平滑化该连续输出的移动量信号。本发明于高空间解析度的应用时改进其线性不良的效应，而在非高空间解析度的应用时仍可达到较佳的操控性。
The present invention discloses an image capture device and method for optical pointing device. The method for smoothing the cursor movement of the optical pointing device of the present invention comprises the following steps: using an optical pointing device to sense an image of a surface and generate a sensing signal; continuously outputting a movement amount signal according to the sensing signal to control the movement of a cursor on a display screen; and smoothing the continuously output movement amount signal to different degrees according to the movement speed represented by the movement amount signal. The present invention improves the effect of poor linearity in high spatial resolution applications, and can still achieve better controllability in non-high spatial resolution applications.
Description
Technical field
The present invention relates to optical indicating device, be particularly applied to image acquiring apparatus and the method thereof of optical indicating device.
Background technology
Indicating device, for example mouse, is a kind of its device with respect to the displacement of a support plane that detects.User can hold an indicating device by palm, and it is slided in a plane.This indicating device can calculate its distance with respect to this in-plane displancement, and uses it as the input signal of computer.Tradition indicating device according to installing roller thereon with respect to the rolling amount of a plane to calculate its rolling degree.But the indicating device of roller type can increase along with access times, and accumulation dust consequently disturbs the calculating of its displacement.Therefore, along with scientific-technical progress, optical indicating device, for example optical mouse, replaces the indicating device of traditional roller type gradually.
Optical indicating device is equally also to detect its device with respect to the displacement of a support plane.Be different from the indicating device of traditional roller type, optical indicating device calculates its displacement according to reflection of light.Fig. 1 shows the schematic diagram of a known optical indicating device.As shown in Figure 1, this optical indicating device 100 comprises a light source 102, a condenser lens 104, intercepting lens 106, a sensing apparatus 108 and a processing unit 110.This light source 102 may be a diode light-source or a LASER Light Source, and passes through these condenser lens 104 throw lights in a plane 150.This light forms reflection in this plane 150, and via this intercepting reflection from lens to this sensing apparatus 108.This processing unit 110 can utilize this optical indicating device 100 of calculated signals that this sensing apparatus 108 exports shift length with respect to this plane 150.
Fig. 2 shows the enlarged diagram of this sensing apparatus 108.As shown in Figure 2, this sensing apparatus 108 comprises multiple image sensing unit 200 that are arrayed.Described image sensing unit 200 can catch the image of this plane 150 and produce accordingly sensing signal.This processing unit 110 i.e. relevance (correlation) between more continuous two images, and determines the shift length between this optical indicating device 100 and this plane 150 according to the orientation of higher relevance and degree.For example, if higher in upper left relevance via known second image of comparison result and first image of this processing unit 110, can determine that this optical indicating device 100 moves toward upper left side compared to this plane 150.
Generally speaking, have the optical indicating device of still image sensing cell size, its corresponding spatial resolution (Counts Per Inch, CPI) is also thereupon fixing.If desired when the application of high spatial resolution, for example, be if desired greater than the spatial resolution of this optical indicating device reality, need the amplification that realizes a linear scaling to calculate.But the bad effect of linearity of any this optical indicating device also will be amplified thereupon.Although optical indicating device can utilize smoothing (smoothing) mechanism with the bad effect of this linearity of smoothing, it also will reduce the handling of this optical indicating device, and brings user poor use experience.
Accordingly, industry is needed is a kind of image acquiring apparatus and method thereof that is applied to optical indicating device, it can use situation adjustment according to difference, in the time of the application of high spatial resolution, improve its linear bad effect, and still can reach preferably handling in the time of the application of non-high spatial resolution.The present invention provides this device and method.
Summary of the invention
The invention provides a kind of image acquiring apparatus, for an optical indicating device, the image sensing unit that this image acquiring apparatus comprises multiple adjacent arrangements and a processing unit.Described image sensing unit is in order to the image on sensing one surface and produce a sensing signal, and this sensing signal is in order to estimate the translational speed of this optical indicating device.This processing unit is in order to export a movement amount signal according to this sensing signal continuously, to control the movement of the cursor on a display screen, and according to the translational speed of this movement amount signal representative, the movement amount signal of this continuous wave output of smoothing to some extent.
A kind of method that the invention provides cursor movement of level and smooth optical indicating device, comprises the following step: utilize the image on optical indicating device sensing one surface and produce sensing signal; Export a movement amount signal to control the movement of the cursor on a display screen according to this sensing signal continuously; And according to the translational speed of this movement amount signal representative, the movement amount signal of this continuous wave output of smoothing to some extent.
Beneficial effect of the present invention is, a kind of image acquiring apparatus and method thereof that is applied to optical indicating device of the present invention, it can use situation adjustment according to difference, in the time of the application of high spatial resolution, improve its linear bad effect, and still can reach preferably handling in the time of the application of non-high spatial resolution.
Sketch out technical characterictic of the present invention above, so that detailed description is below obtained better understanding.Other technical characterictic that forms claim target of the present invention will be described in below.The technical field of the invention technician should understand, and the concept below disclosing can be used as basis with specific embodiment and revised quite easily or design other structure or technique and realize the object identical with the present invention.The technical field of the invention technician also should understand, and the construction that this class is equal to also cannot depart from the spirit and scope of the present invention that claim proposes.
Brief description of the drawings
Fig. 1 shows the schematic diagram of a known optical indicating device;
Fig. 2 shows the enlarged diagram of the image sensing unit of a known optical indicating device;
Fig. 3 shows the schematic diagram of the image acquiring apparatus of one embodiment of the invention;
Fig. 4 shows according to the process flow diagram of the method for the cursor movement of the smoothing optical indicating device of one embodiment of the invention;
Fig. 5 shows the process flow diagram of the method for the cursor movement of smoothing optical indicating device according to another embodiment of the present invention;
Fig. 6 shows according to impulse response and the formula thereof of an infinite impulse response digital filter of one embodiment of the invention; And
Fig. 7 shows according to impulse response and the formula thereof of a finite impulse response digital filter of one embodiment of the invention.
Wherein, description of reference numerals is as follows:
100 optical indicating devices
102 light sources
104 condenser lenses
106 intercept lens
108 sensing apparatus
110 processing units
150 planes
200 image sensing unit
300 image acquiring apparatus
302 image sensing unit
304 storage unit
306 processing units
350 optical indicating devices
360 planes
401～408 steps
501～508 steps
Embodiment
The direction that the present invention inquires at this is a kind of image acquiring apparatus and method thereof that is applied to optical indicating device.In order to understand up hill and dale the present invention, will detailed step and composition be proposed in following description.Apparently, enforcement of the present invention is not defined in the specific details that the technology of the present invention those skilled in the art have the knack of.On the other hand, well-known composition or step are not described in details, with the restriction of avoiding causing the present invention unnecessary.Preferred embodiment meeting of the present invention is described in detail as follows, but except these are described in detail, the present invention can also be implemented in other embodiment widely, and not circumscribed of scope of the present invention, and it is as the criterion with claim.
Fig. 3 shows the schematic diagram of the image acquiring apparatus that is applied to optical indicating device of one embodiment of the invention.As shown in Figure 3, this image acquiring apparatus 300 is installed in an optical indicating device 350, and the image sensing unit 302, a storage unit 304 and the processing unit 306 that comprise multiple adjacent arrangements.This optical indicating device 350 slides with respect to a plane 360.Described image sensing unit 302 is in order to the image on sensing one surface and produce a sensing signal, and wherein this sensing signal can be in order to estimate the translational speed of this optical indicating device 350.The sensing signal that this storage unit 304 produces in order to store described image sensing unit 302.The sensing signal that this processing unit 306 produces in order to sensing signal that relatively this storage unit 304 is stored and described image sensing unit 302 is to calculate the movement value of this optical indicating device 350.In addition, this processing unit 306 can be exported a movement amount signal to control the movement of the cursor on a display screen according to this sensing signal continuously, and according to the translational speed of this movement amount signal representative, the movement amount signal of this continuous wave output of smoothing to some extent.
Fig. 4 shows according to the process flow diagram of the method for the cursor movement of the smoothing optical indicating device of one embodiment of the invention, and wherein the method can be applicable to this processing unit 306.In step 401, utilize the image on optical indicating device sensing one surface and produce sensing signal, and entering step 402.In step 402, according to this sensing signal export a movement amount signal to control the movement of a cursor display screen on continuously, and enter step 403.In step 403, judge that whether this optical indicating device is in a height smoothing state.If the determination result is YES, enter step 405, otherwise enter step 404.In step 404, judge whether the translational speed of this movement amount signal representative exceedes one first translational speed.If the determination result is YES, enter step 406, otherwise enter step 407.In step 405, judge that whether the translational speed of this movement amount signal representative is lower than one second translational speed, wherein this first translational speed is greater than this second translational speed.If the determination result is YES, enter step 407, otherwise enter step 406.In step 406, the movement amount signal of this continuous wave output of height smoothing, and enter step 408.In step 407, the movement amount signal of low this continuous wave output of smoothing, and enter step 408.In step 408, judge whether method ends.If so, method ends, otherwise get back to step 401.
In part embodiment of the present invention, in step 404, this processing unit 306 calculates value of moving horizontally and vertical movement value of this optical indicating device 350 according to this sensing signal.When the calculated value of moving horizontally is greater than one first horizontal critical value or when the vertical movement value that calculates is greater than one first vertical critical value, this processing unit 306 determines that the translational speed of this movement amount signal representative exceedes this first translational speed.In step 405, this processing unit 306 also calculates value of moving horizontally and vertical movement value of this optical indicating device 350 according to this sensing signal.When the calculated value of moving horizontally is less than one second horizontal critical value, and the vertical movement value calculating is while being less than one second vertical critical value, and this processing unit 306 determines that these movement amount signals represent that translational speed is lower than this second translational speed.
According to the method shown in Fig. 4, this processing unit 306 can be in the time that the movement amount signal of its output exceedes a preset threshold value, the movement amount signal of this continuous wave output of smoothing.In special words, this processing unit 306 can be in the time that the translational speed of this movement amount signal representative exceedes this first translational speed, the movement amount signal of this continuous wave output of height smoothing, in the time that this movement amount signal represents translational speed lower than this second translational speed, the movement amount signal of low this continuous wave output of smoothing.In the time of collocation practical application, if user is to manipulate at a high speed this optical indicating device 350, that is the translational speed of the movement amount signal representative exported of this optical indicating device 350 exceedes this first translational speed, the scope that this optical indicating device 350 is contained is wider.Now, can utilize Linear magnifying technology in high to reach the object of high spatial resolution.Meanwhile, the movement amount signal of this this continuous wave output of i.e. height smoothing of processing unit 306 is to reach the effect of smoothing.Because the system of user is now to manipulate at a high speed this optical indicating device 350, this user will be difficult to experience the effect of pullling that smoothing causes.If user manipulates this optical indicating device 350 with low speed, that is the translational speed of the movement amount signal representative exported of this optical indicating device 350 is during lower than this second translational speed, and the scope that this optical indicating device 350 is contained is less.Now, the movement amount signal that this processing unit 306 can low this continuous wave output of smoothing, to reduce the effect of pullling that smoothing caused, and brings user better use experience.
Fig. 5 shows the process flow diagram of the method for the cursor movement of smoothing optical indicating device according to another embodiment of the present invention, and wherein the method can be applicable to this processing unit 306.In step 501, utilize the image on optical indicating device sensing one surface and produce sensing signal, and entering step 502.In step 502, according to this sensing signal export a movement amount signal to control the movement of a cursor display screen on continuously, and enter step 503.In step 503, judge that whether this optical indicating device is in a height smoothing state.If the determination result is YES, enter step 505, otherwise enter step 504.In step 504, judge whether this movement amount signal exceedes one first preset threshold value.If the determination result is YES, enter step 506, otherwise enter step 507.In step 505, judge that whether this movement amount signal is lower than one second preset threshold value, wherein this first preset threshold value is greater than this second preset threshold value.If the determination result is YES, enter step 507, otherwise enter step 506.In step 506, the movement amount signal of this continuous wave output of height smoothing, and enter step 508.In step 507, the movement amount signal of low this continuous wave output of smoothing, and enter step 508.In step 508, judge whether method ends.If so, method ends, otherwise get back to step 501.
In part embodiment of the present invention, in step 504, this processing unit 306 calculates value of moving horizontally and vertical movement value of this optical indicating device 350 according to this sensing signal.When the calculated value of moving horizontally is greater than one first horizontal critical value or when the vertical movement value that calculates is greater than one first vertical critical value, this processing unit 306 determines that this movement amount signal exceedes this first preset threshold value.In step 505, this processing unit 306 also calculates value of moving horizontally and vertical movement value of this optical indicating device 350 according to this sensing signal.When the calculated value of moving horizontally is less than one second horizontal critical value and when the vertical movement value that calculates is less than one second vertical critical value, this processing unit 306 determines that these movement amount signals are lower than this second preset threshold value.
According to the method shown in Fig. 5, this processing unit 306 can be in the time that the movement amount signal of its output exceedes a preset threshold value, the movement amount signal of this continuous wave output of smoothing.In special words, this processing unit 306 can be in the time that this movement amount signal exceedes this first preset threshold value, the movement amount signal of height smoothing this continuous wave output, in this movement amount signal during lower than this second preset threshold value, the movement amount signal of low this continuous wave output of smoothing.Be similar to the method for Fig. 4, the method that this optical indicating device 350 can application drawing 5, makes this optical indicating device 350 in utilizing linear amplification when reaching high spatial resolution, movement amount signal that can this continuous wave output of height smoothing.Otherwise, in the time focusing on user handling, the movement amount signal of low this continuous wave output of smoothing.
In part embodiment of the present invention, the treatment mechanism of this height smoothing realizes according to an infinite impulse response digital filter (Infinite Impulse Filter, IIR) algorithm.In part embodiment of the present invention, this optical indicating device 350 further comprises the movement amount signal of an infinite impulse response digital filter circuit with this continuous wave output of height smoothing.Fig. 6 shows according to impulse response and the formula thereof of an infinite impulse response digital filter of one embodiment of the invention, and wherein this infinite impulse response digital filter can be applicable to this optical indicating device 350 of Fig. 3.
In part embodiment of the present invention, the treatment mechanism of this minuent smoothing realizes according to a finite impulse response digital filter (Finite Impulse Filter, FIR) algorithm.In part embodiment of the present invention, this optical indicating device 350 further comprises the movement amount signal of a finite impulse response digital filter circuit with low this continuous wave output of smoothing.Fig. 7 shows according to the impulse response of several finite impulse response digital filters of one embodiment of the invention and formula thereof, and wherein said finite impulse response digital filter can be applicable to this optical indicating device 350 of Fig. 3.
In sum, image acquiring apparatus and the method thereof that is applied to optical indicating device of the present invention can be used situation adjustment according to difference, in the time of the application of high spatial resolution, the movement amount signal of height smoothing continuous wave output is to improve its linear bad effect, and in the time of the application of non-high spatial resolution with the movement amount signal of low this continuous wave output of smoothing, therefore can reach preferably handling.
Technology contents of the present invention and technical characterstic disclose as above, but those skilled in the art still may be based on teaching of the present invention and announcements and done all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to those disclosed embodiments, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by claim.
Claims (19)
1. an image acquiring apparatus, for an optical indicating device, comprises:
The image sensing unit of multiple adjacent arrangements, in order to the image on sensing one surface and produce a sensing signal, this sensing signal is in order to estimate the translational speed of this optical indicating device; And
One processing unit, in order to export a movement amount signal according to this sensing signal continuously, to control the movement of the cursor on a display screen, and in the time that the translational speed of this movement amount signal representative exceedes first translational speed, the movement amount signal of this continuous wave output of height smoothing, in the translational speed of this movement amount signal representative during lower than second translational speed, the movement amount signal of low this continuous wave output of smoothing, wherein this first translational speed is greater than this second translational speed.
2. image acquiring apparatus as claimed in claim 1, it is characterized in that, this processing unit can calculate according to this sensing signal value of moving horizontally and vertical movement value of this optical indicating device, when the calculated value of moving horizontally is greater than one first horizontal critical value or when the vertical movement value that calculates is greater than one first vertical critical value, this processing unit determines that this movement amount signal represents that translational speed exceedes this first translational speed, when the calculated value of moving horizontally is less than one second horizontal critical value and when the vertical movement value that calculates is less than one second vertical critical value, this processing unit determines that this movement amount signal represents that translational speed is lower than this second translational speed.
3. image acquiring apparatus as claimed in claim 1, is characterized in that, the treatment mechanism of this height smoothing realizes according to an infinite impulse response digital filter algorithm.
4. image acquiring apparatus as claimed in claim 1, is characterized in that, this image acquiring apparatus further comprises the movement amount signal of an infinite impulse response digital filter circuit with this continuous wave output of height smoothing.
5. image acquiring apparatus as claimed in claim 1, is characterized in that, the treatment mechanism of this minuent smoothing realizes according to a finite impulse response digital filter algorithm.
6. image acquiring apparatus as claimed in claim 1, is characterized in that, this image acquiring apparatus further comprises the movement amount signal of a finite impulse response digital filter circuit with low this continuous wave output of smoothing.
7. an image acquiring apparatus, for an optical indicating device, comprises:
The image sensing unit of multiple adjacent arrangements, in order to the image on sensing one surface and produce a sensing signal, this sensing signal is in order to estimate the translational speed of this optical indicating device; And
One processing unit, in order to export a movement amount signal according to this sensing signal continuously, to control the movement of the cursor on a display screen, and in the time that this movement amount signal exceedes one first preset threshold value, the movement amount signal of this continuous wave output of height smoothing, and in this movement amount signal during lower than one second preset threshold value, the movement amount signal of low this continuous wave output of smoothing, wherein this first preset threshold value is greater than this second preset threshold value.
8. image acquiring apparatus as claimed in claim 7, it is characterized in that, this processing unit calculates value of moving horizontally and vertical movement value of this optical indicating device according to this sensing signal, when the calculated value of moving horizontally is greater than one first horizontal critical value or when the vertical movement value that calculates is greater than one first vertical critical value, this processing unit determines that this movement amount signal exceedes one first preset threshold value, when the calculated value of moving horizontally is less than one second horizontal critical value and when the vertical movement value that calculates is less than one second vertical critical value, this processing unit determines that this movement amount signal is lower than this second preset threshold value.
9. image acquiring apparatus as claimed in claim 7, is characterized in that, the treatment mechanism of this height smoothing realizes according to an infinite impulse response digital filter algorithm.
10. image acquiring apparatus as claimed in claim 7, is characterized in that, this image acquiring apparatus further comprises the movement amount signal of an infinite impulse response digital filter circuit with this continuous wave output of height smoothing.
11. image acquiring apparatus as claimed in claim 7, is characterized in that, the treatment mechanism of this minuent smoothing realizes according to a finite impulse response digital filter algorithm.
12. image acquiring apparatus as claimed in claim 7, is characterized in that, this image acquiring apparatus further comprises the movement amount signal of a finite impulse response digital filter circuit with low this continuous wave output of smoothing.
13. image acquiring apparatus as claimed in claim 1, is characterized in that, this image acquiring apparatus also comprises the sensing signal of a storage unit to be produced in order to store described image sensing unit.
The method of the cursor movement of 14. 1 kinds of smoothing optical indicating devices, comprises the following step:
Utilize the image on optical indicating device sensing one surface and produce sensing signal;
Export a movement amount signal to control the movement of the cursor on a display screen according to this sensing signal continuously; And
In the time that the translational speed of this movement amount signal representative exceedes first translational speed, the movement amount signal of this continuous wave output of height smoothing, and in the time that this movement amount signal represents translational speed lower than second translational speed, the movement amount signal of low this continuous wave output of smoothing, wherein this first translational speed is greater than this second translational speed.
15. methods as claimed in claim 14, is characterized in that, the treatment mechanism of this height smoothing realizes according to an infinite impulse response digital filter algorithm.
16. methods as claimed in claim 14, is characterized in that, the treatment mechanism of this minuent smoothing realizes according to a finite impulse response digital filter algorithm.
The method of the cursor movement of 17. 1 kinds of smoothing optical indicating devices, comprises the following step:
Utilize the image on optical indicating device sensing one surface and produce sensing signal;
Export a movement amount signal to control the movement of the cursor on a display screen according to this sensing signal continuously; And
In the time that this movement amount signal exceedes one first preset threshold value, the movement amount signal of this continuous wave output of height smoothing, and when this movement amount signal is during lower than one second preset threshold value, the movement amount signal of low this continuous wave output of smoothing, wherein this first preset threshold value is greater than this second preset threshold value.
18. methods as claimed in claim 17, is characterized in that, the treatment mechanism of this height smoothing realizes according to an infinite impulse response digital filter algorithm.
19. methods as claimed in claim 17, is characterized in that, the treatment mechanism of this minuent smoothing realizes according to a finite impulse response digital filter algorithm.
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| CN1510395A (en) * | 2002-11-21 | 2004-07-07 | 艾勒博科技股份有限公司 | Optical positioning system and method for computing this optical positioning system moving value |
| CN101554038A (en) * | 2006-11-17 | 2009-10-07 | 硅通讯技术有限公司 | Low power image sensor adjusting reference voltage automatically and optical pointing device comprising the same |
| CN101739158A (en) * | 2008-11-24 | 2010-06-16 | 原相科技股份有限公司 | Track smoothing method and navigation device using same |
| CN101853091A (en) * | 2009-03-31 | 2010-10-06 | 原相科技股份有限公司 | Optical displacement detection device and its operation method |
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| KR100873985B1 (en) * | 2007-07-18 | 2008-12-17 | 주식회사 애트랩 | Optical pointing device and automatic gain control method of the device |
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| CN1510395A (en) * | 2002-11-21 | 2004-07-07 | 艾勒博科技股份有限公司 | Optical positioning system and method for computing this optical positioning system moving value |
| CN101554038A (en) * | 2006-11-17 | 2009-10-07 | 硅通讯技术有限公司 | Low power image sensor adjusting reference voltage automatically and optical pointing device comprising the same |
| CN101739158A (en) * | 2008-11-24 | 2010-06-16 | 原相科技股份有限公司 | Track smoothing method and navigation device using same |
| CN101853091A (en) * | 2009-03-31 | 2010-10-06 | 原相科技股份有限公司 | Optical displacement detection device and its operation method |
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